Web Front-end
JS Tutorial
Detailed explanation of jquery's wrap(), wrap(), and unwrap() methods
Detailed explanation of jquery's wrap(), wrap(), and unwrap() methods
wrap(): Add the specified HTML structure outside each matching element,
wrapAll(): Add a specified HTML structure outside all matching elements (as a whole) wrap( ) Function is used to wrap the specified HTML structure outside each matching element.
Relative to this function is the unwrap() function, which is used for the parent element of the current matching element (only the parent element is removed, and all its internal nodes are retained).
This function belongs to the <a href="http://www.php.cn/wiki/1495.html" target="_blank">jQuery</a> object (instance).
Syntax
jQueryObject.wrap( wrapper )
Parameters
| Parameters | Description |
|---|---|
| The wrapper | String/Element/jQuery/Function type is used to wrap nodes of matching elements. |
If the parameter wrapper is a string, it is treated as a jQuery selector or html string, jQuery will judge it by itself.
jQuery 1.4 New support: Parameter wrapper can be a function. wrap() will traverse and execute this function based on all matching elements, and this in the function will point to the corresponding DOM element.
wrap() will also pass in a parameter to the function, which is the index of the current element in the matching element. The return value of the function is the node content used for wrapping (can be an html string, DOM element or jQuery object).
Note: If wrapper matches multiple elements, only the first element will be used as the wrapping element.
Note: If wrapper is a multi-level nested element (for example), wrap() will check each level of nesting from outside to inside first node. If the node has no child nodes or the first child node is not an Element node (such as text node, comment node, etc.), stop searching inward and directly append (append()) at the end of the current node. ) currently matches the element.
Return value
wrap()The return value of the function is jQuery type, returns the current jQuery object itself (to facilitate chain-style programming).
Note: Even if the wrapper element is an element in the current page, the element will not disappear from its original position. Because wrap() uses a copy (clone) of the element to act as a wrapper.
Example & Description
wrap()The function is used to insert content before each matching element :
<span class="tag"><p><span class="pln">段落文本1<span class="tag"><span></span></p><span class="pln"><br/><span class="tag"><p><span class="pln">段落文本2<span class="tag"><span></span></p><span class="pln"><br/><br/><span class="tag"><script<span class="pln"> <span class="atn">type<span class="pun">=<span class="atv">"text/<a href="http://www.php.cn/wiki/48.html" target="_blank">javascript</a>"<span class="tag">><span class="pln"><br/>$<span class="pun">(<span class="str">"p"<span class="pun">).<span class="pln">wrap<span class="pun">(<span class="pln"> <span class="str">'<p></p>'<span class="pln"> <span class="pun">);<span class="pln"> <br/><span class="tag"></script><span class="pln"><br/><br/><span class="com"><!--以下是jQuery代码执行后的html内容--><span class="pln"><br/><span class="tag"><p><p><span class="pln">段落文本1<span class="tag"><span></span></p></p><span class="pln"><br/><span class="tag"><p><p><span class="pln">段落文本2<span class="tag"><span></span></p></p></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
Take the following HTML code as an example:
<span class="tag"><p<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n1"<span class="tag">><span class="pln"><br/> <span class="tag"><span<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n2"<span class="tag">><span class="pln">span#n2<span class="tag"></span><span class="pln"> <br/><span class="tag"></p><span class="pln"><br/><span class="tag"><p<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n3"<span class="tag">><span class="pln"><br/> <span class="tag"><input<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n4"<span class="pln"> <span class="atn">type<span class="pun">=<span class="atv">"text"<span class="pln"> <span class="tag">/><span class="pln"><br/><span class="tag"></p><span class="pln"><br/><span class="tag"><span<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n5"<span class="tag">><span class="pln">多层嵌套1<span class="tag"></span><span class="pln"><br/><span class="tag"><span<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n6"<span class="tag">><span class="pln">多层嵌套2<span class="tag"></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
The following jQuery sample code is used to demonstrate the specific usage of the wrap() function:
<span class="com">// 在n2元素外包裹strong元素：<strong>{#n2}</strong><span class="pln"><br/>$<span class="pun">(<span class="str">"#n2"<span class="pun">).<span class="pln">wrap<span class="pun">(<span class="str">'<strong/>'<span class="pun">);<span class="pln"><br/><br/><br/><span class="com">// 在n4元素外包裹form元素：<form name="myForm">{#n4}</form><span class="pln"><br/>$<span class="pun">(<span class="str">"#n4"<span class="pun">).<span class="pln">wrap<span class="pun">(<span class="str">'<form name="myForm"></form>'<span class="pun">);<span class="pln"><br/><br/><br/><span class="com">// 在每个p元素外包裹p元素：<p data_id="index">{p}</p><span class="pln"><br/>$<span class="pun">(<span class="str">"p"<span class="pun">).<span class="pln">wrap<span class="pun">(<span class="pln"> <span class="kwd">function<span class="pun">(<span class="pln">index<span class="pun">){<span class="pln"><br/> <span class="kwd"><a href="http://www.php.cn/wiki/135.html" target="_blank">return</a><span class="pln"> <span class="str">'<p data_id="'<span class="pln"> <span class="pun">+<span class="pln"> index <span class="pun">+<span class="pln"> <span class="str">'"></p>'<span class="pun">;<span class="pln"> <br/><span class="pun">}<span class="pln"> <span class="pun">);<span class="pln"><br/><br/><br/><span class="com">// 在n5元素外包裹嵌套的p元素：<p><p><em><b>{#n5}</b></em></p></p><span class="pln"><br/>$<span class="pun">(<span class="str">"#n5"<span class="pun">).<span class="pln">wrap<span class="pun">(<span class="pln"> <span class="str">'<p><p><em><b></b></em></p></p>'<span class="pln"> <span class="pun">);<span class="pln"><br/><br/><br/><span class="com">// 在n6元素外包裹嵌套的p元素：<p><p> <em><b></b></em>${#n5}</p></p><span class="pln"><br/><span class="com">// wrap()会从外层p依次往内部查找，以确定n5元素的所在位置<span class="pln"><br/><span class="com">// wrap()将从外往内检查每层嵌套的第一个元素，如果该元素没有子元素或者第一个子元素不是Element节点，就停止向内查找<span class="pln"><br/><span class="com">// 由于参数的'<p>'后面有空格(文本节点)，也就是说p元素的第一个子元素不是Element类型，因此直接将n6插入到p元素内部的末尾位置<span class="pln"><br/>$<span class="pun">(<span class="str">"#n6"<span class="pun">).<span class="pln">wrap<span class="pun">(<span class="pln"> <span class="str">'<p><p> <em><b></b></em></p></p>'<span class="pln"> <span class="pun">);</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>Run the code
wrap() will place the start tag and end tag of the wrapped element on both sides of the matching element, will not add any additional whitespace characters , the complete html code after the above code is executed is as follows (the format has not been adjusted in any way):
<span class="tag"><p<span class="pln"> <span class="atn">data_id<span class="pun">=<span class="atv">"0"<span class="tag">><p<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n1"<span class="tag">><span class="pln"><br/> <span class="tag"><strong><span<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n2"<span class="tag">><span class="pln">span#n2<span class="tag"></span></strong><span class="pln"> <br/><span class="tag"></p></p><span class="pln"><br/><span class="tag"><p<span class="pln"> <span class="atn">data_id<span class="pun">=<span class="atv">"1"<span class="tag">><p<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n3"<span class="tag">><span class="pln"><br/> <span class="tag"><form<span class="pln"> <span class="atn">name<span class="pun">=<span class="atv">"myForm"<span class="tag">><input<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n4"<span class="pln"> <span class="atn">type<span class="pun">=<span class="atv">"text"<span class="tag">></form><span class="pln"><br/><span class="tag"></p></p><span class="pln"><br/><span class="tag"><p><p><em><b><span<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n5"<span class="tag">><span class="pln">多层嵌套1<span class="tag"></span></b></em></p></p><span class="pln"><br/><span class="tag"><p><p><span class="pln"> <span class="tag"><em><b></b></em><span<span class="pln"> <span class="atn">id<span class="pun">=<span class="atv">"n6"<span class="tag">><span class="pln">多层嵌套2<span class="tag"></span></p></p></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
The above is the detailed content of Detailed explanation of jquery's wrap(), wrap(), and unwrap() methods. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to delete WeChat friends? How to delete WeChat friends
Mar 04, 2024 am 11:10 AM
WeChat is one of the mainstream chat tools. We can meet new friends, contact old friends and maintain the friendship between friends through WeChat. Just as there is no such thing as a banquet that never ends, disagreements will inevitably occur when people get along with each other. When a person extremely affects your mood, or you find that your views are inconsistent when you get along, and you can no longer communicate, then we may need to delete WeChat friends. How to delete WeChat friends? The first step to delete WeChat friends: tap [Address Book] on the main WeChat interface; the second step: click on the friend you want to delete and enter [Details]; the third step: click [...] in the upper right corner; Step 4: Click [Delete] below; Step 5: After understanding the page prompts, click [Delete Contact]; Warm
How to write a novel in the Tomato Free Novel app. Share the tutorial on how to write a novel in Tomato Novel.
Mar 28, 2024 pm 12:50 PM
Tomato Novel is a very popular novel reading software. We often have new novels and comics to read in Tomato Novel. Every novel and comic is very interesting. Many friends also want to write novels. Earn pocket money and edit the content of the novel you want to write into text. So how do we write the novel in it? My friends don’t know, so let’s go to this site together. Let’s take some time to look at an introduction to how to write a novel. Share the Tomato novel tutorial on how to write a novel. 1. First open the Tomato free novel app on your mobile phone and click on Personal Center - Writer Center. 2. Jump to the Tomato Writer Assistant page - click on Create a new book at the end of the novel.
How to enter bios on Colorful motherboard? Teach you two methods
Mar 13, 2024 pm 06:01 PM
Colorful motherboards enjoy high popularity and market share in the Chinese domestic market, but some users of Colorful motherboards still don’t know how to enter the bios for settings? In response to this situation, the editor has specially brought you two methods to enter the colorful motherboard bios. Come and try it! Method 1: Use the U disk startup shortcut key to directly enter the U disk installation system. The shortcut key for the Colorful motherboard to start the U disk with one click is ESC or F11. First, use Black Shark Installation Master to create a Black Shark U disk boot disk, and then turn on the computer. When you see the startup screen, continuously press the ESC or F11 key on the keyboard to enter a window for sequential selection of startup items. Move the cursor to the place where "USB" is displayed, and then
How to recover deleted contacts on WeChat (simple tutorial tells you how to recover deleted contacts)
May 01, 2024 pm 12:01 PM
Unfortunately, people often delete certain contacts accidentally for some reasons. WeChat is a widely used social software. To help users solve this problem, this article will introduce how to retrieve deleted contacts in a simple way. 1. Understand the WeChat contact deletion mechanism. This provides us with the possibility to retrieve deleted contacts. The contact deletion mechanism in WeChat removes them from the address book, but does not delete them completely. 2. Use WeChat’s built-in “Contact Book Recovery” function. WeChat provides “Contact Book Recovery” to save time and energy. Users can quickly retrieve previously deleted contacts through this function. 3. Enter the WeChat settings page and click the lower right corner, open the WeChat application "Me" and click the settings icon in the upper right corner to enter the settings page.
Summary of methods to obtain administrator rights in Win11
Mar 09, 2024 am 08:45 AM
A summary of how to obtain Win11 administrator rights. In the Windows 11 operating system, administrator rights are one of the very important permissions that allow users to perform various operations on the system. Sometimes, we may need to obtain administrator rights to complete some operations, such as installing software, modifying system settings, etc. The following summarizes some methods for obtaining Win11 administrator rights, I hope it can help you. 1. Use shortcut keys. In Windows 11 system, you can quickly open the command prompt through shortcut keys.
Quickly master: How to open two WeChat accounts on Huawei mobile phones revealed!
Mar 23, 2024 am 10:42 AM
In today's society, mobile phones have become an indispensable part of our lives. As an important tool for our daily communication, work, and life, WeChat is often used. However, it may be necessary to separate two WeChat accounts when handling different transactions, which requires the mobile phone to support logging in to two WeChat accounts at the same time. As a well-known domestic brand, Huawei mobile phones are used by many people. So what is the method to open two WeChat accounts on Huawei mobile phones? Let’s reveal the secret of this method. First of all, you need to use two WeChat accounts at the same time on your Huawei mobile phone. The easiest way is to
The secret of hatching mobile dragon eggs is revealed (step by step to teach you how to successfully hatch mobile dragon eggs)
May 04, 2024 pm 06:01 PM
Mobile games have become an integral part of people's lives with the development of technology. It has attracted the attention of many players with its cute dragon egg image and interesting hatching process, and one of the games that has attracted much attention is the mobile version of Dragon Egg. To help players better cultivate and grow their own dragons in the game, this article will introduce to you how to hatch dragon eggs in the mobile version. 1. Choose the appropriate type of dragon egg. Players need to carefully choose the type of dragon egg that they like and suit themselves, based on the different types of dragon egg attributes and abilities provided in the game. 2. Upgrade the level of the incubation machine. Players need to improve the level of the incubation machine by completing tasks and collecting props. The level of the incubation machine determines the hatching speed and hatching success rate. 3. Collect the resources required for hatching. Players need to be in the game
Detailed explanation of Oracle version query method
Mar 07, 2024 pm 09:21 PM
Detailed explanation of Oracle version query method Oracle is one of the most popular relational database management systems in the world. It provides rich functions and powerful performance and is widely used in enterprises. In the process of database management and development, it is very important to understand the version of the Oracle database. This article will introduce in detail how to query the version information of the Oracle database and give specific code examples. Query the database version of the SQL statement in the Oracle database by executing a simple SQL statement
